Blackburn E-4HPS-25 SPLIT BOLT 4 SOL - 12

The E-4HPS-25 split bolt is rated for 4 solid down to 12 conductor, so it covers the common branch and feeder tap sizes in that band. Anything larger than 4 AWG needs the next size up in the split bolt family, since forcing an oversized conductor into the jaws will not let the bolt close on the threads properly.

It's a copper alloy body, so it's intended for copper-to-copper connections. For aluminum or combination copper/aluminum taps you want a dual-rated connector instead, because a copper-only split bolt on aluminum conductor invites galvanic corrosion at the joint.

No crimp tool. A split bolt like the E-4HPS-25 is a mechanical connector, tightened with two wrenches or a wrench and socket on the bolt head and nut. That's the practical reason electricians reach for it on a service or panel tap where they don't want to carry a hydraulic crimper up a ladder. Compression lugs and C-taps are the alternative when the spec calls for a crimped, non-reversible joint.

Yes. The E-4HPS-25 is a bare copper alloy mechanical connector with no insulation of its own, so any splice or tap made with it has to be re-insulated, either with rubber and vinyl tape built back to the conductor insulation level or with a split-bolt insulating cover, unless the connection is inside an enclosure where bare live metal is acceptable to your inspector.

Sold each, so one split bolt per unit ordered. Count your taps before ordering: a three-phase feeder tap plus neutral means four of them, and most crews keep spares on the truck because a split bolt that's been over-torqued and deformed shouldn't be reused.